I think it is this one they have used as a jack
It can lift 2000kg. and its placed about 1/3 of the way on the H leg, that will give 2000/3=666kg lifting force ! Plenty for the savage
The tubing i think will be 40*40*3, shoud also give some strenght.
The most tricky part is the mesurement of the jacks discribed cirkular movement and the allignment in the lift, but i think it could be done.
this will cost about 1000,- to make and 3000,- to buy ! or 177$ and 530$ aprox.